Which of the Following Is Not a Reason That Capillaries

question 52

Multiple Choice

Which of the following is not a reason that capillaries are highly branched?

• A) Branching creates very narrow vessels that only allow one blood cell through at a time. Forcing blood cells into single-file lines ensures that they do not form clots.
• B) The many branches of capillaries allow the circulatory system to spread out so that no cell in the body is out of range of rapid diffusion from the blood.
• C) Branching slows down the flow of blood by increasing frictional drag. Slower blood flow allows more time for the exchange of gases and nutrients.
• D) Branching increases the surface area of the capillaries creating more surface area over which gas and nutrient exchange can occur.